[U-Boot] [PATCH] Add SPI support to mx51evk board
Stefano Babic
sbabic at denx.de
Tue Mar 16 17:22:21 CET 2010
The patch adds SPI devices to the mx51evk board. Two devices
are supported: Atmel SPI flash and MC13892 power
controller.
Signed-off-by: Stefano Babic <sbabic at denx.de>
---
board/freescale/mx51evk/mx51evk.c | 178 +++++++++++++++++++++++++++++++++++++
include/configs/mx51evk.h | 17 ++++
2 files changed, 195 insertions(+), 0 deletions(-)
diff --git a/board/freescale/mx51evk/mx51evk.c b/board/freescale/mx51evk/mx51evk.c
index 8754563..b52dedb 100644
--- a/board/freescale/mx51evk/mx51evk.c
+++ b/board/freescale/mx51evk/mx51evk.c
@@ -27,9 +27,11 @@
#include <asm/arch/iomux.h>
#include <asm/errno.h>
#include <asm/arch/sys_proto.h>
+#include <asm/arch/crm_regs.h>
#include <i2c.h>
#include <mmc.h>
#include <fsl_esdhc.h>
+#include <mc13892.h>
#include "mx51evk.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -213,6 +215,167 @@ static void setup_iomux_fec(void)
mxc_iomux_set_pad(MX51_PIN_NANDF_D11, 0x2180);
}
+#ifdef CONFIG_MXC_SPI
+static void setup_iomux_spi(int cs)
+{
+ /* 000: Select mux mode: ALT0 mux port: MOSI of instance: ecspi1 */
+ mxc_request_iomux(MX51_PIN_CSPI1_MOSI, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_MOSI, 0x105);
+
+ /* 000: Select mux mode: ALT0 mux port: MISO of instance: ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_MISO, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_MISO, 0x105);
+
+ if (cs == 0) {
+ /* de-select SS1 of instance: ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_SS1, IOMUX_CONFIG_ALT3);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_SS1, 0x85);
+ /* 000: Select mux mode: ALT0 mux port: SS0 ecspi1 */
+ mxc_request_iomux(MX51_PIN_CSPI1_SS0, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_SS0, 0x185);
+ } else if (cs == 1) {
+ /* de-select SS0 of instance: ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_SS0, IOMUX_CONFIG_ALT3);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_SS0, 0x85);
+ /* 000: Select mux mode: ALT0 mux port: SS1 ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_SS1, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_SS1, 0x105);
+ }
+
+ /* 000: Select mux mode: ALT0 mux port: RDY of instance: ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_RDY, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_RDY, 0x180);
+
+ /* 000: Select mux mode: ALT0 mux port: SCLK of instance: ecspi1. */
+ mxc_request_iomux(MX51_PIN_CSPI1_SCLK, IOMUX_CONFIG_ALT0);
+ mxc_iomux_set_pad(MX51_PIN_CSPI1_SCLK, 0x105);
+}
+#endif
+
+static void power_init(void)
+{
+ struct spi_slave *slave;
+ unsigned int val;
+ unsigned int reg;
+ u32 atlas_id;
+ struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)MXC_CCM_BASE;
+
+#define REV_ATLAS_LITE_1_0 0x8
+#define REV_ATLAS_LITE_1_1 0x9
+#define REV_ATLAS_LITE_2_0 0x10
+#define REV_ATLAS_LITE_2_1 0x11
+
+ slave = mc13892_spi_probe();
+
+ /* Write needed to Power Gate 2 register */
+ val = mc13892_reg_read(slave, MC13892_REG_POWER_MISC);
+ val &= ~0x10000;
+ mc13892_reg_write(slave, MC13892_REG_POWER_MISC, val);
+
+ /* Write needed to update Charger 0 */
+ mc13892_reg_write(slave, MC13892_REG_CHARGE, 0x0023807F);
+
+ /* power up the system first */
+ mc13892_reg_write(slave, MC13892_REG_POWER_MISC, 0x00200000);
+
+ if (is_soc_rev(CHIP_REV_2_0) >= 0) {
+ /* Set core voltage to 1.1V */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_0);
+ val = (val & (~0x1F)) | 0x14;
+ mc13892_reg_write(slave, MC13892_REG_SW_0, val);
+
+ /* Setup VCC (SW2) to 1.25 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_1);
+ val = (val & (~0x1F)) | 0x1A;
+ mc13892_reg_write(slave, MC13892_REG_SW_1, val);
+
+ /* Setup 1V2_DIG1 (SW3) to 1.25 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_2);
+ val = (val & (~0x1F)) | 0x1A;
+ mc13892_reg_write(slave, MC13892_REG_SW_2, val);
+ udelay(50);
+ /* Raise the core frequency to 800MHz */
+ writel(0x0, &mxc_ccm->cacrr);
+ } else {
+ /* TO 3.0 */
+ /* Setup VCC (SW2) to 1.225 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_1);
+ val = (val & (~0x1F)) | 0x19;
+ mc13892_reg_write(slave, MC13892_REG_SW_1, val);
+
+ /* Setup 1V2_DIG1 (SW3) to 1.2 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_2);
+ val = (val & (~0x1F)) | 0x18;
+ mc13892_reg_write(slave, MC13892_REG_SW_2, val);
+ }
+
+ atlas_id = mc13892_reg_read(slave, MC13892_REG_IDENTIFICATION);
+ if (((atlas_id & 0x1F) < REV_ATLAS_LITE_2_0) ||
+ (((atlas_id >> 9) & 0x3) == 0)) {
+ /* Set switchers in PWM mode for Atlas 2.0 and lower */
+ /* Setup the switcher mode for SW1 & SW2*/
+ val = mc13892_reg_read(slave, MC13892_REG_SW_4);
+ val = (val & (~0x3C0F)) | 0x1405;
+ mc13892_reg_write(slave, MC13892_REG_SW_4, val);
+
+ /* Setup the switcher mode for SW3 & SW4 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_5);
+ val = (val & (~0xF0F)) | 0x505;
+ mc13892_reg_write(slave, MC13892_REG_SW_5, val);
+ } else {
+ /* Set switchers in Auto in NORMAL mode & STANDBY mode */
+ /* Setup the switcher mode for SW1 & SW2*/
+ val = mc13892_reg_read(slave, MC13892_REG_SW_4);
+ val = (val & (~0x3C0F)) | 0x2008;
+ mc13892_reg_write(slave, MC13892_REG_SW_4, val);
+
+ /* Setup the switcher mode for SW3 & SW4 */
+ val = mc13892_reg_read(slave, MC13892_REG_SW_5);
+ val = (val & (~0xF0F)) | 0x808;
+ mc13892_reg_write(slave, MC13892_REG_SW_5, val);
+ }
+
+ /* Set VDIG to 1.65V, VGEN3 to 1.8V, VCAM to 2.5V */
+ val = mc13892_reg_read(slave, MC13892_REG_SETTING_0);
+ val &= ~0x34030;
+ val |= 0x10020;
+ mc13892_reg_write(slave, MC13892_REG_SETTING_0, val);
+
+ /* Set VVIDEO to 2.775V, VAUDIO to 3V, VSD to 3.15V */
+ val = mc13892_reg_read(slave, MC13892_REG_SETTING_1);
+ val &= ~0x1FC;
+ val |= 0x1F4;
+ mc13892_reg_write(slave, MC13892_REG_SETTING_1, val);
+
+ /* Configure VGEN3 and VCAM regulators to use external PNP */
+ val = 0x208;
+ mc13892_reg_write(slave, MC13892_REG_MODE_1, val);
+ udelay(200);
+
+ reg = readl(GPIO2_BASE_ADDR + 0x0);
+ reg &= ~0x4000; /* Lower reset line */
+ writel(reg, GPIO2_BASE_ADDR + 0x0);
+
+ reg = readl(GPIO2_BASE_ADDR + 0x4);
+ reg |= 0x4000; /* configure GPIO lines as output */
+ writel(reg, GPIO2_BASE_ADDR + 0x4);
+
+ /* Reset the ethernet controller over GPIO */
+ writel(0x1, IOMUXC_BASE_ADDR + 0x0AC);
+
+ /* Enable VGEN3, VCAM, VAUDIO, VVIDEO, VSD regulators */
+ val = 0x49249;
+ mc13892_reg_write(slave, MC13892_REG_MODE_1, val);
+
+ udelay(500);
+
+ reg = readl(GPIO2_BASE_ADDR + 0x0);
+ reg |= 0x4000;
+ writel(reg, GPIO2_BASE_ADDR + 0x0);
+
+ mc13892_spi_free(slave);
+}
+
#ifdef CONFIG_FSL_ESDHC
int board_mmc_getcd(u8 *cd, struct mmc *mmc)
{
@@ -351,8 +514,23 @@ int board_init(void)
setup_iomux_uart();
setup_expio();
setup_iomux_fec();
+#ifdef CONFIG_MXC_SPI
+ setup_iomux_spi(1);
+#endif
+ return 0;
+}
+
+#ifdef BOARD_LATE_INIT
+int board_late_init(void)
+{
+#ifdef CONFIG_MXC_SPI
+ setup_iomux_spi(0);
+ power_init();
+#endif
+ setup_iomux_spi(1);
return 0;
}
+#endif
int checkboard(void)
{
diff --git a/include/configs/mx51evk.h b/include/configs/mx51evk.h
index 903fe6d..e2daeca 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -54,6 +54,8 @@
/* size in bytes reserved for initial data */
#define CONFIG_SYS_GBL_DATA_SIZE 128
+#define BOARD_LATE_INIT
+
/*
* Hardware drivers
*/
@@ -61,6 +63,21 @@
#define CONFIG_SYS_MX51_UART1
/*
+ * SPI Configs
+ * */
+#define CONFIG_CMD_SPI
+
+#define CONFIG_MXC_SPI
+
+#define CONFIG_MC13892_SPI_PMIC
+#define CONFIG_MC13892_SPI_PMIC_BUS 0
+#define CONFIG_MC13892_SPI_PMIC_CS 0
+#define CONFIG_MC13892_SPI_PMIC_CLK 2500000
+#define CONFIG_MC13892_SPI_PMIC_MODE (SPI_CPOL | SPI_CS_HIGH)
+
+#define MAX_SPI_BYTES (64 * 4)
+
+/*
* MMC Configs
* */
#define CONFIG_FSL_ESDHC
--
1.6.3.3
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